Detection device

Abstract

The embodiment of the invention discloses a detection device, which comprises a power supply module, a multi-path driving output signal indicating circuit, a multi-path detection input signal indicating circuit and a plurality of switch units, the power supply module is connected with a first end of the driving output signal indicating circuit, a second end of the driving output signal indicating circuit is connected with a first pin of the switch unit, a first end of the detection input signal indicating circuit is connected with a sixth pin of the switch unit, and a second pin and a fifth pin of the switch unit are connected and are connected with a line to be detected; the switch unit is used for connecting the second pin with the third pin and connecting the fifth pin with the sixth pin when the circuit to be detected is a sensor circuit; and when the to-be-tested circuit is a driving part circuit, the second pin and the first pin are connected, and the fifth pin and the fourth pin are connected. According to the technical scheme, the problem that traditional detection is low in efficiency is solved, the testing process is simplified, wiring errors are reduced, and the testing efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of component circuit testing technology on automated equipment, and more particularly to a testing device. Background Technology

[0002] In modern industrial manufacturing, such as the manufacturing of 3C products and the assembly of automotive parts, automated equipment is widely used on production lines to ensure safe and efficient production. To achieve autonomous sensing, precise control, and intelligent operation of automated equipment throughout the entire production process, multiple sensors or drive components are typically installed on key parts.

[0003] Due to the large number of connection points in components such as sensors and solenoid valves, wiring errors or poor continuity are prone to occur during installation. Current testing procedures only allow power-on commissioning after all mechanical and electrical assembly of the equipment is complete. During commissioning, the correct connections, good continuity, and normal signal transmission of these sensor and solenoid valve circuits are checked. If any circuit has a problem, each circuit needs to be checked individually, which increases the commissioning cycle and labor costs, impacting overall efficiency. Summary of the Invention

[0004] This invention provides a detection device to solve the problem of low efficiency in traditional detection methods.

[0005] According to one aspect of the present invention, a detection device is provided, comprising: a power supply module, a multi-channel drive output signal indication circuit, a multi-channel detection input signal indication circuit, and a plurality of switching units;

[0006] The power module is connected to the first terminal of the drive output signal indicator circuit. The second terminal of each drive output signal indicator circuit is connected to the first pin of a switch unit. The first terminal of each detection input signal indicator circuit is connected to the sixth pin of a switch unit. The second and fifth pins of the switch unit are connected and connected to the circuit under test. The third and fourth pins of the switch unit are left floating. The circuit under test includes a drive component circuit and a sensor circuit. The switch unit is used to connect the second and third pins and the fifth and sixth pins when the circuit under test is the sensor circuit. When the circuit under test is a drive component circuit, it connects the second and first pins and the fifth and fourth pins.

[0007] Optionally, the switching unit includes a double-pole double-throw switch. The second and fifth pins of the double-pole double-throw switch are respectively a first common terminal and a second common terminal. The first pin is a first normally open contact corresponding to the first common terminal, the third pin is a first normally closed contact corresponding to the first common terminal, the fourth pin is a second normally open contact corresponding to the second common terminal, and the sixth pin is a second normally closed contact corresponding to the second common terminal. The first pin of the double-pole double-throw switch is connected to the second terminal of a drive output indicator circuit. The second and fifth pins of the double-pole double-throw switch are connected and connected to the circuit under test. The third and fourth pins of the double-pole double-throw switch are left floating. The sixth pin of the double-pole double-throw switch is connected to the first terminal of a detection input signal indicator circuit.

[0008] Optionally, the drive output signal indicator circuit includes a first light-emitting diode, a first resistor, and a first diode;

[0009] The anode of the first light-emitting diode is connected to the power module, the cathode of the first light-emitting diode is connected to the first end of the first resistor, the second end of the first resistor is connected to the anode of the first diode, and the cathode of the first diode is connected to the first pin of the switching unit.

[0010] Optionally, the detection input signal indication circuit includes a second light-emitting diode, a second resistor, and a third resistor;

[0011] The anode of the second light-emitting diode is connected to the sixth pin of the switching unit and the first end of the third resistor, respectively. The cathode of the second light-emitting diode is connected to the first end of the second resistor. The second end of the second resistor and the second end of the third resistor are both connected to the ground terminal.

[0012] Optionally, it also includes a signal conversion module, wherein multiple first terminals of the signal conversion module are connected one-to-one with multiple lines under test, and multiple second terminals of the signal conversion module are connected one-to-one with the second pins of multiple switching units through digital communication harnesses. The signal conversion module is used to centrally connect multiple lines under test and convert them into preset standard digital communication, and transmit them to the second pins of multiple switching units.

[0013] Optionally, the power module includes a battery cell, a battery charging current monitoring circuit, a voltage control circuit, a reference voltage circuit, and a battery remaining power monitoring circuit.

[0014] The first terminal of the battery charging current monitoring circuit is connected to an external power interface. The second terminal of the battery charging current monitoring circuit is connected to the charging port of the battery cell. The discharging port of the battery cell is connected to the first terminal of the voltage control circuit. The second terminal of the voltage control circuit is connected to the external power interface. The third terminal of the voltage control circuit is connected to the first terminal of the reference voltage circuit. The fourth terminal of the voltage control circuit is connected to the first terminal of the drive output signal indication circuit. The second terminal of the reference voltage circuit is connected to the first terminal of the battery remaining power monitoring circuit. The second terminal of the battery remaining power monitoring circuit is connected to the first terminal of the battery cell. The battery charging current monitoring circuit is used to monitor the charging current of the battery cell when the external power source is charging the battery cell, and to determine the charging status of the battery cell based on the charging current. The battery cell is used to supply power to the reference voltage circuit and the drive output signal indication circuit. The voltage control circuit is used to control the external power source or the battery cell to supply power to the reference voltage circuit and the drive output signal indication circuit. The reference voltage circuit is used to generate a reference voltage and transmit it to the battery remaining power monitoring circuit. The battery remaining power monitoring circuit is used to monitor the remaining power of the battery cell.

[0015] Optionally, the battery charging current monitoring circuit includes a fourth resistor, a second diode, a fifth resistor, a sixth resistor, a third diode, a current sensing amplifier, a first capacitor, a second capacitor, a third capacitor, a seventh resistor, an eighth resistor, a first transistor, a third light-emitting diode, and a ninth resistor.

[0016] The first end of the fourth resistor is connected to the external power interface and the first end of the fifth resistor, respectively. The second end of the fourth resistor is connected to the anode of the second diode and the first end of the sixth resistor, respectively. The cathode of the second diode is connected to the first end of the charging port of the battery cell, and the second end of the charging port of the battery cell is connected to a reference ground. The second end of the fifth resistor is connected to the first electrode of the third diode and the first input terminal of the current sensing amplifier, respectively. The second end of the sixth resistor is connected to the second electrode of the third diode and the second input terminal of the current sensing amplifier, respectively. The third electrode of the third diode is connected to a ground terminal. The first power supply terminal of the current sensing amplifier is connected to the first power signal terminal and the first end of the first capacitor, respectively. The second terminal of the capacitor is connected to the ground terminal. The second power supply terminal of the current sensing amplifier is connected to the ground terminal. The output terminal of the current sensing amplifier is connected to the first terminal of the second capacitor, the first terminal of the third capacitor, and the first terminal of the seventh resistor, respectively. The reference signal terminal of the current sensing amplifier is connected to the second terminal of the second capacitor, the first terminal of the third capacitor, and the ground terminal, respectively. The second terminal of the seventh resistor is connected to the first terminal of the eighth resistor and the gate of the first transistor, respectively. The first electrode of the first transistor is connected to the second terminal of the eighth resistor and the ground terminal, respectively. The second electrode of the first transistor is connected to the cathode of the third light-emitting diode. The anode of the third light-emitting diode is connected to the first terminal of the ninth resistor. The second terminal of the ninth resistor is connected to the first power supply signal terminal.

[0017] Optionally, the reference voltage circuit includes a fourth capacitor, a fifth capacitor, a first power supply chip, a tenth resistor, a sixth capacitor, and a seventh capacitor;

[0018] The first terminal of the fourth capacitor is connected to the third terminal of the voltage control circuit, the first terminal of the fifth capacitor, and the first terminal of the tenth resistor. The second terminal of the fourth capacitor is connected to the second terminal of the fifth capacitor and the first terminal of the first power chip. The first terminal of the first power chip is also connected to the second terminal of the sixth capacitor, the second terminal of the fourth capacitor, and the ground terminal. The second terminal of the tenth resistor is connected to the second terminal of the first power chip, the first terminal of the sixth capacitor, and the first terminal of the seventh capacitor. The first terminal of the seventh capacitor is connected to the first terminal of the battery remaining power monitoring circuit.

[0019] Optionally, the battery remaining power monitoring circuit includes an eleventh resistor, a twelfth resistor, an eighth capacitor, a comparator, a thirteenth resistor, a ninth capacitor, a fourth light-emitting diode, and a fourteenth resistor;

[0020] The first end of the eleventh resistor is connected to the first end of the battery cell. The second end of the eleventh resistor is connected to the first end of the twelfth resistor and the first input end of the comparator. The second end of the twelfth resistor is connected to the ground terminal. The second input end of the comparator is connected to the second end of the reference voltage circuit and the first end of the eighth capacitor. The second end of the eighth capacitor is connected to the ground terminal. The first power supply terminal of the comparator is connected to the second power supply signal terminal. The second power supply terminal of the comparator is connected to the ground terminal. The output terminal of the comparator is connected to the first end of the thirteenth resistor and the cathode of the fourth light-emitting diode. The second end of the thirteenth resistor is connected to the second power supply signal terminal and the first end of the ninth capacitor. The second end of the ninth capacitor is connected to the ground terminal. The anode of the fourth light-emitting diode is connected to the first end of the fourteenth resistor. The second end of the fourteenth resistor is connected to the second power supply signal terminal.

[0021] Optionally, the voltage control circuit includes a relay circuit, a control switch, and a voltage conversion circuit;

[0022] The first terminal of the relay circuit is connected to the discharge port of the battery cell, the second terminal of the relay circuit is connected to the external power supply interface, the third terminal of the relay circuit is connected to the first terminal of the control switch, the second terminal of the control switch is connected to the first terminal of the voltage conversion circuit, the second terminal of the voltage conversion circuit is connected to the first terminal of the reference voltage circuit, and the third terminal of the voltage conversion circuit is connected to the first terminal of the drive output signal indication circuit. The relay circuit is used to select the external power supply or the battery cell to power the reference voltage circuit and the drive output signal indication circuit. The voltage conversion circuit is used to convert the voltage of the external power supply or the battery cell to the operating voltage required by the reference voltage circuit and the drive output signal indication circuit.

[0023] The technical solution of this invention, by setting up an output signal indicator circuit, a detection input signal indicator circuit, and a switching unit, separates the output signal indicator circuit and the detection input signal indicator circuit. By controlling the switching unit to connect different pins, it ensures that when testing different types of circuits under test (DUTs), the indicator circuit related to the DUT type is used to detect and display the DUT status. This allows for quick and accurate determination of whether the DUT is normal. Only the DUT needs to be connected to a common interface point, reducing human wiring errors. Furthermore, multiple DUTs can be tested simultaneously, improving testing efficiency. This invention solves the problem of low testing efficiency in traditional methods, simplifies the testing process, reduces wiring errors, and improves testing efficiency.

[0024] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a detection device provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of another detection device provided in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of a testing device based on 10 lines under test, provided in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of another detection device provided in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of a signal conversion module with 10 lines under test as an example provided in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of a power module provided in an embodiment of the present invention;

[0032] Figure 7 This is a circuit diagram of a battery charging current monitoring circuit provided in an embodiment of the present invention;

[0033] Figure 8 This is a circuit schematic diagram of a reference voltage circuit provided in an embodiment of the present invention;

[0034] Figure 9 This is a circuit diagram of a battery remaining power monitoring circuit provided in an embodiment of the present invention;

[0035] Figure 10 This is a structural block diagram of a detection device provided in an embodiment of the present invention. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] Figure 1 This is a schematic diagram of a detection device provided in an embodiment of the present invention. This embodiment is applicable to the continuity testing of signal lines in large equipment and can be applied to fields such as engineering machinery and automated production lines. Figure 1 As shown, the detection device includes: a power module 101, a multi-channel drive output signal indication circuit 102, a multi-channel detection input signal indication circuit 102, and multiple switching units 104;

[0039] The power module 101 is connected to the first end of the drive output signal indicator circuit 102. The second end of each drive output signal indicator circuit 102 is connected to the first pin P1 of a switching unit 104. The first end of each detection input signal indicator circuit 103 is connected to the sixth pin P6 of a switching unit 104. The second pin P2 and the fifth pin P5 of the switching unit 104 are connected and connected to the circuit under test. The third pin P3 and the fourth pin P4 of the switching unit 104 are left floating. The circuit under test includes a drive component circuit and a sensor circuit. The switching unit 104 is used to connect the second pin P2 and the third pin P3, and connect the fifth pin P5 and the sixth pin P6 when the circuit under test is a sensor circuit. When the circuit under test is a drive component circuit, it connects the second pin P2 and the first pin P1, and connects the fifth pin P5 and the fourth pin P4.

[0040] The power module 101 is connected to one end of the multi-channel drive output signal indication circuit 102, providing power to the circuit. The power module 101 may include a battery and an external power source. The external power source can power the detection device or charge the battery. The first end of the drive output signal indication circuit 102 is connected to the power module 101; therefore, the drive output signal indication circuit 102 can be used to detect solenoid valve-type circuits under test. The detection input signal indication circuit 103 can be used to detect sensor-type circuits under test. The drive output signal indication circuit 102 and the detection input signal circuit 103 may include indicator lights to show whether the circuit under test is conducting normally. The switching unit 104 is the control element of the detection device; each switching unit 104 individually controls the detection of one circuit under test. The circuit under test includes drive component circuitry and sensor circuitry. Drive components may include solenoid valves, relays, etc., and sensors may include proximity switches, photoelectric switches, safety light curtains, laser sensors, magnetic proximity sensors, etc.

[0041] Specifically, when the circuit under test is a sensor circuit, the switch unit 104 connects the second pin P2 and the third pin P3, as well as the fifth pin P5 and the sixth pin P6. This connects the sensor circuit to the detection input signal indication circuit 103. When the sensor circuit is manually triggered, if it is normal, a loop is formed between the sensor circuit and the detection input signal indication circuit 103, indicating that the sensor circuit is normal. If the sensor circuit is faulty, a loop cannot be formed between the sensor circuit and the detection input signal indication circuit 103, indicating that the sensor circuit is abnormal. When the circuit under test is a drive component circuit, pressing the switch unit 104 connects the second pin P2 and the first pin P1, as well as the fifth pin P5 and the fourth pin P4. This connects the drive component circuit to the drive output signal indication circuit 102. The power module 101 can then supply power to the drive component circuit through the drive output signal indication circuit 102 and the switch unit 104. When the drive component circuit is normal, the drive component circuit and the drive output signal indicator circuit 102 form a loop, and the drive output signal indicator circuit 102 can indicate that the sensor circuit is normal; when the drive component circuit is faulty, the entire circuit cannot form a loop, and the drive output signal indicator circuit 102 can indicate that the sensor circuit is abnormal.

[0042] The technical solution of this invention, by setting up an output signal indicator circuit, a detection input signal indicator circuit, and a switching unit, separates the output signal indicator circuit and the detection input signal indicator circuit. By controlling the switching unit to connect different pins, it ensures that when testing different types of circuits under test (DUTs), the indicator circuit related to the DUT type is used to detect and display the DUT status. This allows for quick and accurate determination of whether the DUT is normal. Only the DUT needs to be connected to a common interface point, reducing human wiring errors. Furthermore, multiple DUTs can be tested simultaneously, improving testing efficiency. This invention solves the problem of low testing efficiency in traditional methods, simplifies the testing process, reduces wiring errors, and improves testing efficiency.

[0043] Figure 2 This is a schematic diagram of another detection device provided in an embodiment of the present invention. In some optional embodiments of the present invention, such as... Figure 2 As shown, the switching unit 104 includes a double-pole double-throw switch 1041. The second pin P2 and the fifth pin P5 of the double-pole double-throw switch 1041 are the first common terminal and the second common terminal, respectively. The first pin P1 is the first normally open contact corresponding to the first common terminal, the third pin P2 is the first normally closed contact corresponding to the first common terminal, the fourth pin P4 is the second normally open contact corresponding to the second common terminal, and the sixth pin P6 is the second normally closed contact corresponding to the second common terminal. The first pin P1 of the double-pole double-throw switch 1041 is connected to the second terminal of a drive output indicator circuit 102. The second pin P2 and the fifth pin P5 of the double-pole double-throw switch 1041 are connected and connected to the circuit under test. The third pin P3 and the fourth pin P4 of the double-pole double-throw switch 1041 are left floating. The sixth pin P6 of the double-pole double-throw switch 1041 is connected to the first terminal of a detection input signal indicator circuit 103.

[0044] The double-pole double-throw switch 1041 includes two independent switches, each with a common terminal, a normally open contact, and a normally closed contact. Pin 2 and pin 5 are the first and second common terminals, respectively, and are shorted to connect to the circuit under test. Pin 3 and pin 6 are the normally closed contacts of the first and second common terminals, while pin 1 and pin 4 are the normally open contacts. When the switch is not pressed, the two common terminals are connected to the two normally closed contacts, connecting the circuit under test to the detection input signal indicator circuit 103. At this time, the circuit under test is the sensor circuit. When the sensor circuit is manually triggered, if it is normal, a loop is formed between the sensor circuit and the detection input signal indicator circuit 103, indicating that the sensor circuit is normal. If the sensor circuit is faulty, a loop cannot be formed between the sensor circuit and the detection input signal indicator circuit 103, indicating that the sensor circuit is abnormal. When the switch is pressed, the two common terminals are connected to two normally open contacts, connecting the circuit under test to the drive output signal indicator circuit 102. At this time, the circuit under test is the drive component circuit. The power module 101 can supply power to the drive component circuit via the drive output signal indicator circuit 102 and the switching unit 104. When the drive component circuit is normal, the drive component circuit and the drive output signal indicator circuit 102 form a loop, and the drive output signal indicator circuit 102 indicates that the drive component circuit is normal. When the drive component circuit is faulty, the drive component circuit and the drive output signal indicator circuit 102 cannot form a loop, and the drive output signal indicator circuit 102 indicates that the drive component circuit is faulty. In some embodiments, the switching unit 104 can also be two single-pole double-throw switches.

[0045] In some alternative embodiments of the present invention, reference continues to be made. Figure 2 The drive output signal indicator circuit 102 includes a first light-emitting diode LED1, a first resistor R1, and a first diode D1;

[0046] The anode of the first light-emitting diode LED1 is connected to the power supply module 101, the cathode of the first light-emitting diode LED1 is connected to the first end of the first resistor R1, the second end of the first resistor R1 is connected to the anode of the first diode D1, and the cathode of the first diode D1 is connected to the first pin P1 of the switching unit.

[0047] When current flows, the first light-emitting diode (LED1) lights up. The first resistor R1 is a current-limiting resistor, protecting the first LED1. When the circuit under test is a driver component circuit, the manual control switch unit 104 connects the driver component circuit to the driver output signal indicator circuit 102. When the driver component circuit is normal, the driver output signal indicator circuit 102 and the driver component circuit form a loop, thus driving the first LED1 to light up; when the driver component circuit malfunctions, the driver output signal indicator circuit 102 and the driver component circuit cannot form a loop, and the corresponding first LED1 does not light up.

[0048] The state of the first light-emitting diode LED1 can be used to determine whether the circuit of the connected driving component is normal.

[0049] In some alternative embodiments of the present invention, reference continues to be made. Figure 2 The input signal detection indicator circuit 103 includes a second light-emitting diode LED2, a second resistor R2, and a third resistor R3;

[0050] The anode of the second light-emitting diode LED2 is connected to the sixth pin P6 of the switching unit 104 and the first end of the third resistor R3, respectively. The cathode of the second light-emitting diode LED2 is connected to the first end of the second resistor R2. The second ends of the second resistor R2 and the second ends of the third resistor R3 are both connected to the ground terminal GND.

[0051] When current flows through the circuit, the second LED (LED2) lights up. The second resistor R2 is a current-limiting resistor, protecting LED2. The third resistor R3 is a buffer resistor. When the circuit under test is a sensor circuit, it is connected to the input signal indicator circuit 103. When the external sensor is manually triggered, if the sensor circuit is normal, the input signal indicator circuit 103 and the sensor circuit form a loop, and LED2 lights up. If the sensor circuit is faulty, the input signal indicator circuit 103 and the sensor circuit cannot form a loop, and LED2 does not light up. The state of LED2 indicates whether the sensor circuit connected to the current channel is functioning correctly.

[0052] Figure 3 This is a schematic diagram of the structure of a testing device based on a 10-channel test line provided in an embodiment of the present invention, as shown below. Figure 3As shown, taking 10 test lines as an example, 10 drive output signal indicator circuits 102, detection input signal indicator circuits 103, and 10 switching units 104 are set up. It is assumed that the voltage required for the drive output signal indicator circuit 102 to operate is 12V. When one test line is connected to the detection device, it is assumed that this test line is detected through the first channel. When the test line is a sensor line, the sensor line is connected to the detection input signal indicator circuit 103. The external sensor is manually triggered. If the sensor line is normal, the detection input signal indicator circuit 103 and the sensor line form a loop, and the second LED2 will light up. If the sensor line is faulty, the detection input signal indicator circuit 103 and the sensor line cannot form a loop, and the second LED2 will not light up. The state of the second LED2 can be used to determine whether the sensor line connected to the first channel is normal. When the test line is a drive component line, the switching unit 104 of the first channel is manually controlled to connect the drive component line to the drive output signal indicator circuit 102. When the driving component circuit is normal, the driving output signal indicator circuit 102 and the driving component circuit will form a loop, thereby driving the first light-emitting diode LED1 to light up; when the driving component circuit is faulty, the driving output signal indicator circuit 102 and the driving component circuit cannot form a loop, and the corresponding first light-emitting diode LED1 will not light up. The testing of other circuits under test can be performed in accordance with the method of the first circuit.

[0053] Figure 4 This is a schematic diagram of another detection device provided in an embodiment of the present invention. In some optional embodiments of the present invention, such as... Figure 4 As shown, the testing device also includes a signal conversion module 105. Multiple first terminals of the signal conversion module 105 are connected one-to-one with multiple lines under test. Multiple second terminals of the signal conversion module 105 are connected one-to-one with the second pins P2 of multiple switching units 104 through digital communication harnesses. The signal conversion module 105 is used to centrally connect multiple lines under test and convert them into preset standard digital communication, and transmit them to the second pins P2 of multiple switching units 104.

[0054] The signal conversion module 105 provides a physical interface to centrally connect all the lines under test (DUTs) to this physical interface. The signal conversion module 105 converts the physical connection methods of multiple DUTs into a digital communication interface suitable for transmission, and then transmits the converted status information to multiple switching units 104 via a single digital communication harness. The digital communication harness can be a Small Computer System Interface (SCSI). Multiple first terminals of the signal conversion module 105 are connected to multiple DUTs, with each first terminal corresponding to one DUT. Multiple second terminals of the signal conversion module 105 are connected to the second pins P2 of multiple switching units 104 via the digital communication harness.

[0055] The technical solution of this invention, by setting a signal conversion module, centrally connects multiple lines under test to a single physical interface, simplifying the connection process between the device under test and the testing device, and improving operational convenience and efficiency. The signal conversion module can also convert multiple lines under test into preset standard digital communication, enabling the testing device to connect to the signal conversion module via a universal digital communication harness, improving the versatility of the testing device and reducing equipment costs.

[0056] Figure 5 This is a schematic diagram of a signal conversion module based on a 10-channel test line provided in an embodiment of the present invention. Figure 5 As shown, to ensure portability and ease of operation during application, the overall dimensions of the testing device can be designed to be 175x85x50mm, including 10 lines under test. The 10 signal inputs are configured with standard SCSI-14P female connectors. A 14P standard SCSI communication harness connects the signal conversion module 105 to the testing device, and power is supplied to the lines under test via the female connectors. The signal conversion module 105 includes 10 3P screwless spring-loaded terminals n1, n2…n10, which connect to the lines under test one by one.

[0057] Figure 6 This is a schematic diagram of a power module provided in an embodiment of the present invention. In some optional embodiments of the present invention, such as... Figure 6 As shown, the power module 101 includes a battery unit 1011, a battery charging current monitoring circuit 1012, a voltage control circuit 1013, a reference voltage circuit 1014, and a battery remaining power monitoring circuit 1015.

[0058] The first terminal of the battery charging current monitoring circuit 1012 is connected to an external power interface. The second terminal of the battery charging current monitoring circuit 1012 is connected to the charging port of the battery cell 1011. The discharging port of the battery cell 1011 is connected to the first terminal of the voltage control circuit 1013. The second terminal of the voltage control circuit 1013 is connected to an external power interface. The third terminal Out1 of the voltage control circuit 1013 is connected to the first terminal of the reference voltage circuit 1014. The fourth terminal Out2 of the voltage control circuit 1013 is connected to the first terminal of the drive output signal indication circuit 102. The second terminal Out3 of the reference voltage circuit 1014 is connected to the first terminal of the battery remaining power monitoring circuit 1015. The second terminal Out3 of the battery remaining power monitoring circuit 1015 is connected to the first terminal of the reference voltage circuit 1015. The battery charging current monitoring circuit 102 is connected to the first terminal Out4 of the battery unit 101. When the external power supply charges the battery unit 101, it monitors the charging current of the battery unit 101 and determines the charging state of the battery unit 1011 based on the charging current. The battery unit 1011 is used to supply power to the reference voltage circuit 1014 and the drive output signal indication circuit 102. The voltage control circuit 1013 is used to control the external power supply or the battery unit 1011 to supply power to the reference voltage circuit 1014 and the drive output signal indication circuit 102. The reference voltage circuit 1014 is used to generate a reference voltage and transmit it to the battery remaining power monitoring circuit 1015. The battery remaining power monitoring circuit 1015 is used to monitor the remaining power of the battery unit.

[0059] The battery unit 1011 serves as a backup power source, storing electrical energy. When the external power supply is disconnected, it can provide power to the reference voltage circuit 1014, the drive output signal indicator circuit 102, and other components. The battery charging current monitoring circuit 1012 measures the charging current flowing through the battery unit 1011 in real time when an external power source is connected to charge it, and determines the charging status of the battery unit 1011 based on the monitored charging current value. For example, when the current drops to a preset threshold, it may be determined that the battery unit 1011 has completed charging. The voltage control circuit 101 can select the power source and convert the voltage to the voltage required for the detection device to operate. For example, when an external power source is available, it is used to power the detection device and charge the battery unit 1011. When the external power supply is disconnected, the battery unit 1011 can be used to power the detection device. When the external power source or the battery unit 1011 powers the detection device, the voltage is usually higher. The voltage control circuit 1013 can convert the voltage of the external power source or the battery unit 1011 to the voltage required for the detection device to operate normally. For example, the output voltage of both the external power supply and the battery unit 1011 is 24V DC. The voltage control circuit 1013 can convert the 24V output from the external power supply or the battery unit 1011 to 12V to power the reference voltage circuit 1014 and the drive output signal indicator circuit 102.

[0060] The reference voltage circuit 1014 may include a power supply chip. The power supply chip can generate a reference voltage based on the voltage provided by the voltage control circuit 1013 and provide it to the battery remaining power monitoring circuit 1015 as a benchmark to ensure the accuracy of power monitoring. For example, if the voltage provided by the voltage control circuit 1013 is 12V, the power supply chip can generate a 2.5V reference voltage. The battery remaining power monitoring circuit 1015 can monitor the current remaining power of the battery cell in real time. The battery remaining power monitoring circuit 1015 can determine the remaining power of the battery cell 1011 by measuring the voltage of the battery cell 1011 and comparing it with the reference voltage provided by the reference voltage circuit 1014.

[0061] Figure 7 This is a circuit diagram of a battery charging current monitoring circuit provided in an embodiment of the present invention. In some optional embodiments of the present invention, refer to... Figure 6 and Figure 7 The battery charging current monitoring circuit 1012 includes a fourth resistor R4, a second diode D2, a fifth resistor R5, a sixth resistor R6, a third diode D3, a current sensing amplifier U1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a seventh resistor R7, an eighth resistor R8, a first transistor Q1, a third light-emitting diode LED3, and a ninth resistor R9.

[0062] The first terminal of the fourth resistor R4 is connected to the external power interface and the first terminal of the fifth resistor R5. The second terminal of the fourth resistor R4 is connected to the anode of the second diode D2 and the first terminal of the sixth resistor R6. The cathode of the second diode D2 is connected to the first terminal of the charging port of the battery cell 1011. The second terminal of the charging port of the battery cell 1011 is connected to the reference ground. The second terminal of the fifth resistor R5 is connected to the first electrode of the third diode D3 and the first input terminal of the current sensing amplifier U1. The second terminal of the sixth resistor R6 is connected to the second electrode of the third diode D3 and the second input terminal of the current sensing amplifier U1. The third electrode of the third diode D3 is connected to the ground terminal GND. The first power supply terminal of the current sensing amplifier U1 is connected to the first power signal terminal VCC1 and the first terminal of the first capacitor C1. The second terminal of the first capacitor C1 is connected to the ground terminal GND. The second power supply terminal of the current sensing amplifier U1 is connected to the ground terminal GND. The output terminal of the current sensing amplifier U1 is connected to the first terminal of the second capacitor C2, the first terminal of the third capacitor C3, and the first terminal of the seventh resistor R7. The reference signal terminal of the current sensing amplifier U1 is connected to the second terminal of the second capacitor C2, the first terminal of the third capacitor C3, and the ground terminal GND. The second terminal of the seventh resistor R7 is connected to the first terminal of the eighth resistor R8 and the gate of the first transistor Q1. The first terminal of the first transistor Q1 is connected to the second terminal of the eighth resistor R8 and the ground terminal GND. The second terminal of the first transistor Q1 is connected to the cathode of the third light-emitting diode LED3. The anode of the third light-emitting diode LED3 is connected to the first terminal of the ninth resistor R9. The second terminal of the ninth resistor R9 is connected to the first power supply signal terminal VCC1.

[0063] The third diode, D3, is a transient voltage suppressor diode to prevent instantaneous surge voltages or spike pulses from damaging the downstream current-sensing amplifier U1 during battery cell 1011 charging. When the external power supply charges battery cell 1011, the charging current flows through the fourth resistor R4, passes through the second diode D2, and then flows to the battery cell charging port to charge the battery cell. The voltage across the fourth resistor R4 is amplified by the current-sensing amplifier U1 and output to the gate of the first transistor Q1, controlling the on / off state of the first transistor Q1, thereby controlling whether the third light-emitting diode LED3 is lit or not. Assuming that the current-sensing amplifier U1 can amplify the voltage across the fourth resistor R4 by 100 times, the resistance of the fourth resistor R4 is 0.2Ω, and the minimum conduction voltage VGS of the first transistor Q1 is 0.5V, this translates to a current flowing through the fourth resistor R4: I = VGS / 100 / R4 = 25mA. When the voltage of battery cell 1011 is low, the charging current is large, the conduction voltage VGS of the first transistor Q1 is greater than or equal to 0.5V, the first transistor Q1 is turned on, and battery cell 1011 is charging. At this time, the third light-emitting diode LED3 is lit. When the battery cell 1011 gradually increases in charge, the charging current gradually decreases, and the conduction voltage VGS of the first transistor Q1 is less than 0.5V. At this time, the third light-emitting diode LED3 is not lit, and the battery is fully charged.

[0064] Figure 8 This is a circuit schematic diagram of a reference voltage circuit provided in an embodiment of the present invention. In some optional embodiments of the present invention, the reference voltage is... Figure 6 and Figure 8 The reference voltage circuit 1014 includes a fourth capacitor C4, a fifth capacitor C5, a first power supply chip U2, a tenth resistor R10, a sixth capacitor C6, and a seventh capacitor C7.

[0065] The first terminal of the fourth capacitor C4 is connected to the third terminal Out1 of the voltage control circuit 1013, the first terminal of the fifth capacitor C5, and the first terminal of the tenth resistor R10. The second terminal of the fourth capacitor C4 is connected to the second terminal of the fifth capacitor C5 and the first terminal of the first power chip U2. The first terminal of the first power chip U2 is also connected to the second terminal of the sixth capacitor C6, the second terminal of the fourth capacitor C4, and the ground terminal GND. The second terminal of the tenth resistor R10 is connected to the second terminal of the first power chip U2, the first terminal of the sixth capacitor C6, and the first terminal of the seventh capacitor C7. The first terminal of the seventh capacitor C7 is connected to the first terminal of the battery remaining power monitoring circuit 1015.

[0066] The first power supply chip U2 can be a reference voltage source chip, capable of generating a stable fixed output voltage, such as 2.5V, 3.0V, 3.3V, or 5.0V. The tenth resistor R10 protects the first power supply chip U2 from excessive input current. R10, together with the fourth capacitor C4 and the fifth capacitor C5, forms an RC filter to filter out noise from the power supply voltage of the voltage control circuit 1013. The fourth capacitor C4 and the fifth capacitor C5 can have different capacitance values. The first terminal of the seventh capacitor is the second terminal Out3 of the reference voltage circuit 1014. The sixth capacitor C6 and the seventh capacitor C7 further stabilize and filter out noise from the output of the first power supply chip U2, improving the stability of the reference voltage and reducing the output impedance.

[0067] Figure 9 This is a circuit diagram of a battery remaining power monitoring circuit provided in an embodiment of the present invention. In some optional embodiments of the present invention, refer to... Figure 6 and Figure 9 The battery remaining power monitoring circuit 1015 includes an eleventh resistor R11, a twelfth resistor R12, an eighth capacitor C8, a comparator COMP, a thirteenth resistor R13, a ninth capacitor C9, a fourth light-emitting diode LED4, and a fourteenth resistor R14.

[0068] The first end of the eleventh resistor R11 is connected to the first end Out4 of the battery cell 1011. The second end of the eleventh resistor R11 is connected to the first end of the twelfth resistor R12 and the first input of the comparator COMP. The second end of the twelfth resistor R12 is connected to the ground terminal. The second input of the comparator COMP is connected to the second end Out3 of the reference voltage circuit 1014 and the first end of the eighth capacitor C8. The second end of the eighth capacitor C8 is connected to the ground terminal GND. The first power supply terminal of the comparator COMP is connected to the second power supply signal terminal VCC2. The second power supply terminal of the comparator COMP is connected to the ground terminal GND. The output terminal of the comparator COMP is connected to the first end of the thirteenth resistor R13 and the cathode of the fourth light-emitting diode LED4. The second end of the thirteenth resistor R13 is connected to the second power supply signal terminal VCC2 and the first end of the ninth capacitor C9. The second end of the ninth capacitor C9 is connected to the ground terminal GND. The anode of the fourth light-emitting diode LED4 is connected to the first end of the fourteenth resistor R14. The second end of the fourteenth resistor R14 is connected to the second power supply signal terminal VCC2.

[0069] In this circuit, the first input of comparator COMP can be a positive input, and the second input can be a negative input. The reference voltage generated by reference voltage circuit 1014 is input to the negative input of comparator COMP. The charge of battery cell 1011 is divided by resistors R11 and R12 and output to the positive input of comparator COMP. Comparator COMP outputs a high or low level based on the voltage values ​​at the two inputs, thereby controlling whether the fourth LED 4 is lit or not. For example, when the battery cell voltage is high, comparator COMP outputs a high level, controlling the fourth LED 4 to be off; when the battery cell voltage decreases, comparator COMP outputs a low level, controlling the fourth LED 4 to be lit.

[0070] Figure 10 This is a structural block diagram of a detection device provided in an embodiment of the present invention. In some optional embodiments of the present invention, such as... Figure 10 As shown, the voltage control circuit 1013 includes a relay circuit 10131, a control switch 10132, and a voltage conversion circuit 10133;

[0071] The first terminal of relay circuit 10131 is connected to the discharge port of battery unit 101, the second terminal of relay circuit 10131 is connected to the external power supply interface, the third terminal of relay circuit 10131 is connected to the first terminal of control switch 10132, the second terminal of control switch 10132 is connected to the first terminal of voltage conversion circuit 10133, the second terminal of voltage conversion circuit 10133 is connected to the first terminal of reference voltage circuit 1014, and the third terminal of voltage conversion circuit 10133 is connected to the first terminal of drive output signal indication circuit 102. Relay circuit 10131 is used to select external power supply or battery unit 1011 to power reference voltage circuit 1014 and drive output signal indication circuit 102. Voltage conversion circuit 10133 is used to convert the voltage of external power supply or battery unit 1011 to the operating voltage required by reference voltage circuit 10133 and drive output signal indication circuit 102.

[0072] The relay circuit 10131 may include a relay. The relay may include a coil and one or more sets of contacts. The first terminal of the relay circuit 10131 is connected to the discharge port of the battery unit 1011, and can receive electrical energy output from the battery unit 1011. The second terminal of the relay circuit 10131 is connected to an external power supply interface, and can receive electrical energy from an external power source. The relay circuit 10131 can select a power path via the relay. The control switch 10132 can control the external power supply or the battery unit 1011 to supply power to the detection device. When the detection device is idle, the control switch 10132 is disconnected, and the battery unit 1011 does not supply power to the reference voltage circuit 10133 and the drive output signal indication circuit 102, reducing power consumption and extending the service life of the battery unit 1011. The voltage conversion circuit 10133 may be a DC-DC circuit. The first terminal of the voltage conversion circuit 10133 is connected to the control switch 10132, and can receive voltage from the relay circuit 10131 and transmitted through the control switch 10132 from the external power supply or the battery unit 1011. The second terminal of the voltage conversion circuit 10133 is connected to the reference voltage circuit 1014, providing a stable operating voltage for the reference voltage circuit 1014. The third terminal of the voltage conversion circuit 10133 is connected to the drive output signal indicator circuit 102, providing a stable operating voltage for the drive output signal indicator circuit 102. For example, assuming that the output voltage of the external power supply and the battery unit 1011 are both 24V DC, the voltage conversion circuit 10133 can convert the 24V output from the external power supply or the battery unit 1011 to 12V to power the reference voltage circuit 1014 and the drive output signal indicator circuit 102.

[0073] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0074] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A detection device, characterized in that, include: Power module, multi-channel drive output signal indicator circuit, multi-channel detection input signal indicator circuit and multiple switching units; The power module is connected to the first terminal of the drive output signal indicator circuit. The second terminal of each drive output signal indicator circuit is connected to the first pin of a switch unit. The first terminal of each detection input signal indicator circuit is connected to the sixth pin of a switch unit. The second and fifth pins of the switch unit are connected and connected to the circuit under test. The third and fourth pins of the switch unit are left floating. The circuit under test includes a drive component circuit and a sensor circuit. The switch unit is used to connect the second and third pins and the fifth and sixth pins when the circuit under test is the sensor circuit. When the circuit under test is the drive component circuit, it connects the second and first pins and the fifth and fourth pins.

2. The detection device according to claim 1, characterized in that, The switching unit includes a double-pole double-throw switch. The second and fifth pins of the double-pole double-throw switch are respectively a first common terminal and a second common terminal. The first pin is a first normally open contact corresponding to the first common terminal, the third pin is a first normally closed contact corresponding to the first common terminal, the fourth pin is a second normally open contact corresponding to the second common terminal, and the sixth pin is a second normally closed contact corresponding to the second common terminal. The first pin of the double-pole double-throw switch is connected to the second terminal of a drive output indicator circuit. The second and fifth pins of the double-pole double-throw switch are connected and connected to the circuit under test. The third and fourth pins of the double-pole double-throw switch are left floating. The sixth pin of the double-pole double-throw switch is connected to the first terminal of a detection input signal indicator circuit.

3. The detection device according to claim 1, characterized in that, The drive output signal indicator circuit includes a first light-emitting diode, a first resistor, and a first diode; The anode of the first light-emitting diode is connected to the power module, the cathode of the first light-emitting diode is connected to the first end of the first resistor, the second end of the first resistor is connected to the anode of the first diode, and the cathode of the first diode is connected to the first pin of the switching unit.

4. The detection device according to claim 1, characterized in that, The input signal detection indicator circuit includes a second light-emitting diode, a second resistor, and a third resistor; The anode of the second light-emitting diode is connected to the sixth pin of the switching unit and the first end of the third resistor, respectively. The cathode of the second light-emitting diode is connected to the first end of the second resistor. The second end of the second resistor and the second end of the third resistor are both connected to the ground terminal.

5. The detection device according to any one of claims 1-4, characterized in that, It also includes a signal conversion module, wherein multiple first terminals of the signal conversion module are connected one-to-one with multiple lines under test, and multiple second terminals of the signal conversion module are connected one-to-one with the second pins of multiple switching units through digital communication harnesses. The signal conversion module is used to centrally connect multiple lines under test and convert them into preset standard digital communication, and transmit them to the second pins of multiple switching units.

6. The detection device according to claim 1, characterized in that, The power module includes a battery cell, a battery charging current monitoring circuit, a voltage control circuit, a reference voltage circuit, and a battery remaining power monitoring circuit. The first terminal of the battery charging current monitoring circuit is connected to an external power interface; the second terminal of the battery charging current monitoring circuit is connected to the charging port of the battery cell; the discharging port of the battery cell is connected to the first terminal of the voltage control circuit; the second terminal of the voltage control circuit is connected to the external power interface; the third terminal of the voltage control circuit is connected to the first terminal of the reference voltage circuit; the fourth terminal of the voltage control circuit is connected to the first terminal of the drive output signal indication circuit; the second terminal of the reference voltage circuit is connected to the first terminal of the battery remaining power monitoring circuit; and the second terminal of the battery remaining power monitoring circuit is connected to the first terminal of the battery cell. The battery charging current monitoring circuit is used to monitor the charging current of the battery cell when the external power source charges the battery cell, and to determine the charging status of the battery cell based on the charging current. The battery cell is used to supply power to the reference voltage circuit and the drive output signal indication circuit. The voltage control circuit is used to control the external power supply or the battery cell to supply power to the reference voltage circuit and the drive output signal indication circuit; The reference voltage circuit is used to generate a reference voltage and transmit it to the battery remaining power monitoring circuit; the battery remaining power monitoring circuit is used to monitor the remaining power of the battery cell.

7. The detection device according to claim 6, characterized in that, The battery charging current monitoring circuit includes a fourth resistor, a second diode, a fifth resistor, a sixth resistor, a third diode, a current sensing amplifier, a first capacitor, a second capacitor, a third capacitor, a seventh resistor, an eighth resistor, a first transistor, a third light-emitting diode, and a ninth resistor; The first end of the fourth resistor is connected to the external power interface and the first end of the fifth resistor, respectively. The second end of the fourth resistor is connected to the anode of the second diode and the first end of the sixth resistor, respectively. The cathode of the second diode is connected to the first end of the charging port of the battery cell, and the second end of the charging port of the battery cell is connected to a reference ground. The second end of the fifth resistor is connected to the first electrode of the third diode and the first input terminal of the current sensing amplifier, respectively. The second end of the sixth resistor is connected to the second electrode of the third diode and the second input terminal of the current sensing amplifier, respectively. The third electrode of the third diode is connected to a ground terminal. The first power supply terminal of the current sensing amplifier is connected to the first power signal terminal and the first end of the first capacitor, respectively. The second terminal of the capacitor is connected to the ground terminal. The second power supply terminal of the current sensing amplifier is connected to the ground terminal. The output terminal of the current sensing amplifier is connected to the first terminal of the second capacitor, the first terminal of the third capacitor, and the first terminal of the seventh resistor, respectively. The reference signal terminal of the current sensing amplifier is connected to the second terminal of the second capacitor, the first terminal of the third capacitor, and the ground terminal, respectively. The second terminal of the seventh resistor is connected to the first terminal of the eighth resistor and the gate of the first transistor, respectively. The first electrode of the first transistor is connected to the second terminal of the eighth resistor and the ground terminal, respectively. The second electrode of the first transistor is connected to the cathode of the third light-emitting diode. The anode of the third light-emitting diode is connected to the first terminal of the ninth resistor. The second terminal of the ninth resistor is connected to the first power supply signal terminal.

8. The detection device according to claim 6, characterized in that, The reference voltage circuit includes a fourth capacitor, a fifth capacitor, a first power chip, a tenth resistor, a sixth capacitor, and a seventh capacitor. The first terminal of the fourth capacitor is connected to the third terminal of the voltage control circuit, the first terminal of the fifth capacitor, and the first terminal of the tenth resistor. The second terminal of the fourth capacitor is connected to the second terminal of the fifth capacitor and the first terminal of the first power chip. The first terminal of the first power chip is also connected to the second terminal of the sixth capacitor, the second terminal of the fourth capacitor, and the ground terminal. The second terminal of the tenth resistor is connected to the second terminal of the first power chip, the first terminal of the sixth capacitor, and the first terminal of the seventh capacitor. The first terminal of the seventh capacitor is connected to the first terminal of the battery remaining power monitoring circuit.

9. The detection device according to claim 6, characterized in that, The battery remaining power monitoring circuit includes an eleventh resistor, a twelfth resistor, an eighth capacitor, a comparator, a thirteenth resistor, a ninth capacitor, a fourth light-emitting diode, and a fourteenth resistor; The first end of the eleventh resistor is connected to the first end of the battery cell. The second end of the eleventh resistor is connected to the first end of the twelfth resistor and the first input end of the comparator. The second end of the twelfth resistor is connected to the ground terminal. The second input end of the comparator is connected to the second end of the reference voltage circuit and the first end of the eighth capacitor. The second end of the eighth capacitor is connected to the ground terminal. The first power supply terminal of the comparator is connected to the second power supply signal terminal. The second power supply terminal of the comparator is connected to the ground terminal. The output terminal of the comparator is connected to the first end of the thirteenth resistor and the cathode of the fourth light-emitting diode. The second end of the thirteenth resistor is connected to the second power supply signal terminal and the first end of the ninth capacitor. The second end of the ninth capacitor is connected to the ground terminal. The anode of the fourth light-emitting diode is connected to the first end of the fourteenth resistor. The second end of the fourteenth resistor is connected to the second power supply signal terminal.

10. The detection device according to claim 6, characterized in that, The voltage control circuit includes a relay circuit, a control switch, and a voltage conversion circuit; The first terminal of the relay circuit is connected to the discharge port of the battery cell, the second terminal of the relay circuit is connected to the external power supply interface, the third terminal of the relay circuit is connected to the first terminal of the control switch, the second terminal of the control switch is connected to the first terminal of the voltage conversion circuit, the second terminal of the voltage conversion circuit is connected to the first terminal of the reference voltage circuit, and the third terminal of the voltage conversion circuit is connected to the first terminal of the drive output signal indication circuit. The relay circuit is used to select the external power supply or the battery cell to power the reference voltage circuit and the drive output signal indication circuit. The voltage conversion circuit is used to convert the voltage of the external power supply or the battery cell to the operating voltage required by the reference voltage circuit and the drive output signal indication circuit.

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